Since the San Antonio Spurs are in Berlin to play an exhibition game against Alba Berlin, Danny Green used his free time to explore. He went to the Holocaust Memorial in Berlin and took a photo, which is fine. It's not like he's smiling in it. But the caption—"You know I had to do it one time lol #Holocaust"—was a bad caption.
Green later changed the caption to "A lot of history here, more than you could imagine...very sad/tragic things happened #holocaust #berlin." He also apologized on Twitter.
Green obviously didn't mean anything by this, but let it be a lesson to all—"lol #Holocaust" is probably just not a combination of characters you want to be involved with.
Top photo via @TheRaiderFan